options: add some features to video filter parser

This is in preparation of making VOs and AOs use the parser which
originally was for video filters only.

The --vo and --ao options have several very annoying features, which are
added here:
- They can skip unknown video outputs (might be useful if a config file
  is supposed to work on several systems, where not all VOs/AOs are
  available everywhere)
- The trailing "," in "-vo a,b," was significant, and meant that if "a"
  and "b" don't work, try the normal autoprobe order as fallback
- There were deprecated VO names (like "gl3" and "gl"), which have to be
  handled with the option parser
- Separating VO/VF names and options is different
  ("-vf foo=opts" vs. "-vo foo:opts")
- vo_opengl.c provides opengl-hq as opengl + preset options

1 files changed, 11 insertions, 0 deletions

diff --git a/core/m_option.h b/core/m_option.h
index 5f95232076..7fd1ffd04c 100644
--- a/core/m_option.h
+++ b/core/m_option.h
@@ -106,12 +106,23 @@ struct m_obj_desc {
     const struct m_option *options;
     // For free use by the implementer of m_obj_list.get_desc
     const void *p;
+    // If not NULL, options which should be set before applying other options.
+    // This member is usually set my m_obj_list_find() only.
+    // Only works if options is not NULL.
+    const char *init_options;
 };
 
 // Extra definition needed for \ref m_option_type_obj_settings_list options.
 struct m_obj_list {
     bool (*get_desc)(struct m_obj_desc *dst, int index);
     const char *description;
+    // Can be set to a NULL terminated array of aliases
+    const char *aliases[4][5];
+    // Allow a trailing ",", which adds an entry with name=""
+    bool allow_trailer;
+    // Allow unknown entries, for which a dummy entry is inserted, and whose
+    // options are skipped and ignored.
+    bool allow_unknown_entries;
 };
 
 // Find entry by name